{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Among all the aroma compounds , 9 key ones were identified in all samples , including ethyl 2 - methylbutanoate , butyl acetate , 1 - butanol , ethyl hexanoate , 1 - hexanol , butanoic acid , beta - damascenone , hexanoic acid , and octanoic acid ."}
{"Chemical": ["ethyl 2 - methylbutanoate", "butyl acetate", "1 - butanol", "ethyl hexanoate", "1 - hexanol", "butanoic acid", "beta - damascenone", "hexanoic acid", "octanoic acid"]}